Is There Limestone Filler In Roof Shingles

Feeding on the inorganic materials of your roof s materials they ll continue to spread and darken until you get rid of them.

Is there limestone filler in roof shingles.

All companies use limestone they have too. Though often attributed to an accumulation of dirt defective shingles mold or mildew the most common culprit is actually a blue green algae known as gloeocapsa magma that is spread by airborne spores. Well many shingles contain a powdered limestone filler that acts as a food source for algae causing it to survive relatively easily on the top of your roof. The sun and the humidity on your roof give it the first two.

As a result of this loss of shingle mass the roof loses the ability to reflect heat rays. This then creates another issue. Algae feed on the limestone filler used to give the shingles weight. If it s not taken care of it will take years off of the life of your roofing.

Since asphalt is an expensive petroleum based product they try to minimize it by using more crushed limestone. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs. The inorganic materials found in your roof will allow the algae to survive spread and darken. Its used as a filler in order to keep the shingle flexible and also to help the fiberglass matting absorb the asphalt.

Unless they are not using fiberglass matting. Most cases of roof algae or fungus start with a single spore finding its way to your home. As a filler limestone is very cheap plentiful and works rather well. There s more algae on roofs today because manufacturers use crushed limestone within the shingle as a filler so they don t have to use as much asphalt.

Over time as the filler is eaten away the granules protecting the surface of the shingle lose their hold and begin to wash off. The third ingredient nutrients is gained when the spores begin to eat the limestone filler in your roof s shingles. Algae feed on limestone filler contained in asphalt roof shingles. Here s the deal with limestone.